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1977 Coupe DeVille, 1967 Fleetwood Eldorado
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Okay, so I know that the front-drive Eldorados have different exhaust manifolds from the rear-drive Fleetwoods and DeVilles. But, my question is will the manifolds from the '68-'70 472/500's interchange with the manifolds from a '67 429? The reason I ask is my '67 is in desperate need of a set of manifolds and I have found a gentleman locally that is parting out a '69 in horrible shape. Will they fit? Please please please let me know!
 

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1970 Eldorado Fleetwood
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I have a 70 Eldo. I'm not sure about the 429, but I've been told that the 472 and 500 are actually the same block and that the 500 is just bored out differently. But the front-wheel drive stuff gets in the way and dictates some differences in how things are stuffed into the engine compartment.

I couldn't find the manifolds themselves, but RockAuto.com sells gaskets for both the '67 429 and the '70 500 and they are a different gasket. If I had to guess, I would say that the 429 probably has a different manifold (not that guesses are terribly helpful).

I do have a shop manual for the '70 Eldorado. If you have a shop manual for the '67, we can compare part numbers?

Hope this helps,

Brandon
 

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1926 Model T street rod, 2000 Jaguar XJ8, 1999 Corvette.
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6,738 Posts
A wrecking yard has a book called Hollander interchange manual. These books have been out for years and list within various makes, what interchanges. Find a yard that was around when your car was a few years old. Hopefully they still have the proper era manual on the shelf?
 
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